Alexander welsh



(No Modem A. WELSH.

'ELECTRIC LAMP.

No. 295,088. Patented Mar; 1l, 1884.

E E N R 0 T mi A.

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N. PETERS. Ppcmlizmgnpnar. wnhngwn. 0.x;

- Unirse ALEXANDER VELSH, v,OF ST. DENIS, MARYLAND, ASSIGNOR TO THE"VIADUGT MANUFAGTURINGCOMPANY OF BALTIMORE CITY.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 295,088, dated March11, 1884.

Application filed August 9, 1883. (No model.)

To @ZZ whom t may concern: y

Be it known that I, ALEXANDER WELSH, residing at St. Denis, Baltimorecounty, Maryland, have invented certain new and useful Improvements inElectric Lamps, of which the following is a specification, referencebeing had to the accompanying drawings, forming part hereof, in which-Figure l is a view, partlyin section and partly in elevation, showing myimprovements applied. Fig. 2 isavertical transverse section, the upperpart of the lamp being broken away. Fig. 3 is va vertical section(similar to Fig. 2) or" a modidcation. Fig. et isa plan View of theinterior ofthe base of the lamp, showing the connection of thespringplates. Fig. 5 is a bottom plan View of the wooden cup whichreceives the lamp; and Fig. 6 is a partial section, showing an outside`connection with the wires.

Like letters of reference mark the same parts in all the gures.

Y My invention is in the nature of a base for an electric lampcontaining the means for cutting out or turning ofi the current to'extinguish or light it, and Will be fully described hereinafter, andthen specifically pointed out in the claims.

Referring to the drawings by letter, A is the body of an incandescingelectric lamp, B, the carbon ,z C, the Wires, which pass down outofthelamp through a stopper, I), of Wood, cork, or similar material.These parts may be of any ordinary construction, and form no part of mypresent invention, being used siniply to illustrate its connection. 4

The bottom of the lamp is placed in a Wooden cup, E, through which theWires C pass, and at the bottom thereof are secured to and by metalplates e, as seen in Fig. 5. These plates are curved 'with the concaveface down, and corresponding concat/ities, e', are formed in the bottomof the Wooden cup, the metal plates and such concavities alternating atan angle of ninety degrees from eachother.

F is a metallic cup, large enough to receive the Wooden cup, and haringa constricted neck, j, at its bottom, screw-threaded, as shown, to

receive a metallic sleeve, G, by which the Whole lamp, Sto., is securedto the bracket which supports it-very often a gas bracket or pipe.W'ithin the cup F is a ring, H, of nonconducting material, upon whichare secured two spring-plates, I, the ends i of which are curved tocorrespond with the curvature of the metal plates and concarities c e.The Wires @"i'rom the source of supply are passed in through the sleeveG, through a Wooden plug, G', (ora plug ot' any suitablenon-cou ductingor insulating niateriah) and their inner ends are secured in contactwith the spring-plates I by means of screws i. `(See Figs. 2 and 4.) v

The metallic cup F is provided with aslot,

f', extending circumferentially one-fourth the Way around it, throughwhich extends a pin, f2, which is secured to the Wooden cup, and servesto turn it in either direction a distance oi' ninety degrees.v vSupposing the parts to be placed together with the metal plates c incontact with the springrplates then .the circuit will be complete andthe lamp be lighted. To extinguish it, it is only necessary to turn thecup around ninety degrees, thus breaking the contact of the plates e andsprings fi, and bringing the springs into contact with the concavitiesc', cutting Off thecurrent. Tolight the lamp a reverse of thesemovements is necessary.

In Fig. 3 the cup is formed slightly different, a screw-threaded capbeing used to hold the wooden cup in position.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. The combination of the metallic cup slotted, as described, the Woodencup inserted therein and held' by the spring of the metal, the metalplates on the Wooden cup connected to the lamp-wires, and the metallicspring plates secured to the insulatingring, as and for the purpose setforth.

2. The combination, in an electric lamp, of -a Wooden cup to receive theglobe, having the wires passed through it and secured to met-al plateson its bottom, a metallic cup enceinpassing said wooden cup and having`within it In testimony whereof I have hereunto set a non-conductingring, to which is secured my hand in the presence of two witnesses. twospring-plates for attachment to the outer wires, a circumferential slotin the metallic ALEXANDER VELSH. Cup, and a pin passing through saidslot and entering the wooden cup, whereby the relal XVitnesses: tion 0fthe cups to each other may be changed, S. BRASHEARS, as set forth. Guo.H. Pis'rnL.

